<!DOCTYPE html>

<html>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>栅格系统</title>

    <!-- 链接外部样式文件 bootstrap.min.css -->
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">

    <!-- 若只是使用栅格系统，不使用 弹窗、提示、下拉菜单 等效果可以不导入任何JavaScript文件 -->

    <style type="text/css">
        .ecut-wrapper {
            margin-bottom: 25px;
        }
        
        .ecut-wrapper .row>div {
            height: 50px;
        }
        
        .ecut-wrapper .row>div:nth-child(odd) {
            background: #6666fa;
        }
        
        .ecut-wrapper .row>div:nth-child(even) {
            background: #fa6666;
        }
        
        .wrapper1 {
            width: 80vw;
            border: 1px solid blue;
        }
    </style>

</head>

<body>

    <div class="container ecut-wrapper wrapper1">
        <div class="row">
            <div class="col-1">1</div>
            <div class="col-1">2</div>
            <div class="col-1">3</div>
            <div class="col-1">4</div>
            <div class="col-1">5</div>
            <div class="col-1">6</div>
            <div class="col-1">7</div>
            <div class="col-1">8</div>
            <div class="col-1">9</div>
            <div class="col-1">10</div>
            <div class="col-1">11</div>
            <div class="col-1">12</div>
        </div>
    </div>

    <div class="container ecut-wrapper wrapper1">
        <div class="row">
            <div class="col-2">1</div>
            <div class="col-2">2</div>
            <div class="col-2">3</div>
            <div class="col-2">4</div>
            <div class="col-2">5</div>
            <div class="col-2">6</div>
        </div>
    </div>

    <div class="container ecut-wrapper wrapper1">
        <div class="row">
            <div class="col-3">1</div>
            <div class="col-3">2</div>
            <div class="col-3">3</div>
            <div class="col-3">4</div>
        </div>
    </div>

    <div class="container ecut-wrapper wrapper1">
        <div class="row">
            <div class="col-4">1</div>
            <div class="col-4">2</div>
            <div class="col-4">3</div>
        </div>
    </div>

    <div class="container ecut-wrapper wrapper1">
        <div class="row">
            <div class="col-6">1</div>
            <div class="col-6">2</div>
        </div>
    </div>

    <hr>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="col-1">1</div>
            <div class="col-1">2</div>
            <div class="col-1">3</div>
            <div class="col-1">4</div>
            <div class="col-1">5</div>
            <div class="col-1">6</div>
            <div class="col-1">7</div>
            <div class="col-1">8</div>
            <div class="col-1">9</div>
            <div class="col-1">10</div>
            <div class="col-1">11</div>
            <div class="col-1">12</div>
        </div>
    </div>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="col-5">1</div>
            <div class="col-7">2</div>
        </div>
    </div>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="col-3">1</div>
            <div class="col-9">2</div>
        </div>
    </div>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="col-9">1</div>
            <div class="col-3">2</div>
        </div>
    </div>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="col-10">1</div>
            <div class="col-2">2</div>
        </div>
    </div>

    <hr>

    <div class="container-fluid ecut-wrapper wrapper2">
        <div class="row">
            <div class="offset-8 col-2">2</div>
        </div>
    </div>

</body>

</html>